package cn.edu.web;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * @author Davey chan
 */

public class BaseServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//       获取请求路径
        String uri = req.getRequestURI();
//        获取最后一段路径，方法名
        int index=uri.lastIndexOf('/');
        String methodName = uri.substring(index+1);
//        执行方法
//        获取BrandServlet/userservlet 字节码对象class
        Class<? extends BaseServlet> cls = this.getClass();

//        获取方法method对象
        try {
            Method method = cls.getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
            method.invoke(this,req,resp);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
//        执行方法
    }
}
